About: http://webisa.webdatacommons.org/258195358

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Since sources are varied, some source data may lack an element common to other sources, such as authors, in which case it would be pointless to offer users a co-authorship visualization option for that collection.
http://www.w3.org/ns/prov#wasQuotedFrom	dlib.org